Plank support



FIG. 1 is a perspective view of plank support, illustrating an embodiment of design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right view thereof; and

FIG. 7 is a left view thereof.

FIG. 8 is a perspective view of a plank support, illustrating a second embodiment of design;

FIG. 9 is a front view thereof;

FIG. 10 is a back view thereof;

FIG. 11 is a top view thereof;

FIG. 12 is bottom view thereof;

FIG. 13 is a right view thereof; and,

FIG. 14 is a left view thereof.

The plank support is shown with a symbolic break in length. The appearance of any portion of the article between the break lines forms no part of the claimed design. 

CLAIM The ornamental designs for plank support, as shown and described. 